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data.frame rows to a list
I have a data.frame which I would like to convert to a list by rows, meaning each row would correspond to its own list elements. In other words, I would like a list that is as long as the data.frame has rows.
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Batch file to copy directories recursively
Is there a way to copy directories recursively inside a .bat file?
If so, an example would be great. thanks.
3 Answers
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Why use Dijkstra's Algorithm if Breadth First Search (BFS) can do the same thing faster?
Both can be used to find the shortest path from single source. BFS runs in O(E+V) , while Dijkstra's runs in O((V+E)*log(V)) .
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How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
I'm writing an event-driven publish/subscribe application with NodeJS and Redis. I need an example of how to notify web clients when the data values in Redis change.
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Using python's eval() vs. ast.literal_eval()?
I have a situation with some code where eval() came up as a possible solution. Now I have never had
to use eval() before but, I have come across plenty of information about the potential
danger it can cause. That said, I'm very wary about using it.
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Select values from XML field in SQL Server 2008
...ue('(/person//lastName/node())[1]', 'nvarchar(max)') as LastName
FROM [myTable]
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How does LMAX's disruptor pattern work?
...he InfoQ video and tried to read their paper. I understand there is a ring buffer involved, that it is initialized as an extremely large array to take advantage of cache locality, eliminate allocation of new memory.
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How to make a variadic macro (variable number of arguments)
I want to write a macro in C that accepts any number of parameters, not a specific number
5 Answers
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How to define two angular apps / modules in one page?
I'm trying to add two angular apps / modules to one page.
In the fiddles below you can see that always only the first module, referenced in the html code, will work correctly, whereas the second is not recognized by angular.
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What does threadsafe mean?
Recently I tried to Access a textbox from a thread (other than the UI thread) and an exception was thrown. It said something about the "code not being thread safe" and so I ended up writing a delegate (sample from MSDN helped) and calling it instead.
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